move scripts to separate include so we can include them across layouts even if the footer isn't there

_layouts/default.html

@@ -17,5 +17,6 @@
     </main>
 
     {% include footer.html %}
+    {% include scripts.html %}
   </body>
 </html>

_layouts/docs.html

@@ -31,5 +31,7 @@
         {% endif %}
       </div>
     </div>
+
+    {% include scripts.html %}
   </body>
 </html>

_layouts/home.html

@@ -15,5 +15,6 @@
     {{ content }}
 
     {% include footer.html %}
+    {% include scripts.html %}
   </body>
 </html>